Defect healing of reduced graphene oxide via intramolecular cross-dehydrogenative coupling

Title
Defect healing of reduced graphene oxide via intramolecular cross-dehydrogenative coupling
Authors
박옥경최용문황준연양철민김태욱유남호구혜영이중희구본철고문주
Keywords
graphene; reduced graphene oxide; healing; graphene oxide
Issue Date
2013-04
Publisher
Nanotechnology
Citation
VOL 24, NO 18, 185604-1-185604-7
Abstract
A chemical defect healing of reduced graphene oxide (RGO) was carried out via intramolecular cross-dehydrogenative coupling (ICDC) with FeCl3 at room temperature. The Raman intensity ratio of the G-band to the D-band, the IG/ID ratio, of the RGO was increased from 0.77 to 1.64 after the ICDC reaction. From XPS measurements, the AC=C/AC−C ratio, where the peak intensities from the C=C and C–C bonds are abbreviated as AC=C and AC−C, of the RGO was increased from 2.88 to 3.79. These results demonstrate that the relative amount of sp2-hybridized carbon atoms is increased by the ICDC reaction. It is of great interest that after the ICDC reaction the electrical conductivity of the RGO was improved to 71 S cm−1, which is 14 times higher than that of as-prepared RGO (5 S cm−1).
URI
http://pubs.kist.re.kr/handle/201004/44714
ISSN
09574484
Appears in Collections:
KIST Publication > Article
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